BU94607KV-E2

Overview

The BU94607KV-E2 is a USB audio decoder LSI manufactured by ROHM Semiconductor, designed for MP3 encoder and WAV/AAC/WMA/MP3 decoding applications. It integrates a USB 2.0 Full Speed host interface, SD card I/F, CD-ROM I/F, audio DAC, system controller, and an internal regulator for core power supply. The device supports AAC, WMA, and MP3 decoding formats with sample rate conversion capabilities. It operates within a supply voltage range of 3.0 V to 3.6 V and functions across a temperature range of -40°C to +85°C. Encased in a VQFP-80 package measuring 14.0 mm x 14.0 mm x 1.6 mm, it features I2C and SPI interfaces for command control.

Feature Summary

• Integrates USB 2.0 Full Speed host interface with protocol conversion between I2C and USB HID.
• Supports playback of multiple audio formats including MP3, WMA, AAC, and WAV files from USB or SD memory.
• Includes built-in audio DAC with digital soft mute and selectable sound effects such as POPS, JAZZ, and ROCK.
• Features FAT analysis function supporting file browsing, tag analysis, and direct tune selection.

Applications

• Audio products requiring USB and SD card connectivity
• Portable media players with iPod compatibility
• Digital audio decoders with embedded system control

Procurement Notes

Verify the exact ordering suffix against the manufacturer's official documentation to ensure correct packaging configuration. Confirm that the component meets all required environmental specifications for the intended operating temperature range. Cross-reference the part number with the latest datasheet revision to validate pinout and electrical characteristics before integration into the design.

Selection Notes

Select this component when a unified solution for USB host, SD card interface, and multi-format audio decoding is required. Ensure the application supports the necessary external crystal frequency of 16.9344 MHz for PLL operation. Verify that the master microcomputer can communicate via the I2C slave interface for command execution and status monitoring.

Part Context

This component belongs to the BU94605AKV, BU94607AKV, BU94702AKV, and BU94705AKV series of USB Audio Decoder LSIs. The BU94607AKV variant specifically distinguishes itself by supporting iPod connectivity while lacking the MP3 encoding function found in other models like the BU94702AKV. All variants share the same VQFP80 package and core architecture.

Replacement Considerations

BU94607AKV is the base model corresponding to the BU94607KV-E2 ordering suffix. Other compatible parts in the series include BU94605AKV, BU94702AKV, and BU94705AKV, though feature sets such as MP3 encoding or iPod support vary between them.

FAQ

Does the BU94607KV-E2 support MP3 encoding?

No, the BU94607AKV does not support MP3 encoding; this function is available only in the BU94702AKV and BU94705AKV models.

What is the required external crystal frequency for the PLL?

The device requires an external crystal oscillator connected to the XIN_PLL and XOUT_PLL terminals with a frequency of 16.9344 MHz.

Can the device play files directly from a CD-ROM?

Yes, the BU94607AKV includes a CD-ROM decoder function and supports CD-ROM Mode 1, Mode 2 form 1, and Mode 2 form 2 formats.